My analysis uses SMF data and is based only on public documentation of the SMF data. I have to explain my analysis to customers and clients so anything I might know under NDA is not useful in those circumstances.
If some vendor(s), as Ed wrote are using CPU and it is not marked as zXXP eligible, then SMF does not show it as eligible either and it is not used in my analysis. This could lead to the analysis indicating the zXXP is not saving enough $s to make it worthwhile; and this might be the wrong answer, but it is the best answer given the data. The result might be that the analysis shows 1 or more zXXP engines would provide value in your environment. Then, if a vendor marks more CPU usage as eligible then the zIIP engines may run work not included in the analysis and you'll still have eligible work running on GCPs. and as someone wrote earlier in this thread not everything eligible runs on the zXXPs, so you'll almost always have some eligible work that does not run on zXXPs. In this case once the zXXP engine is installed the analysis can be done again, and perhaps more adding more zXXPs is still valuable. My analysis may under-estimate the value of the zXXPs, but so far it has not over-estimated the value. Al I/S Management Strategies, Ltd. +1 414-332-3062 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
